com.sitewhere.rest.service.SiteWhereErrorHandler.java Source code

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Here is the source code for com.sitewhere.rest.service.SiteWhereErrorHandler.java

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/*
 * SiteWhereErrorHandler.java 
 * --------------------------------------------------------------------------------------
 * Copyright (c) Reveal Technologies, LLC. All rights reserved. http://www.reveal-tech.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package com.sitewhere.rest.service;

import java.io.IOException;
import java.util.List;

import org.springframework.http.client.ClientHttpResponse;
import org.springframework.web.client.DefaultResponseErrorHandler;
import org.springframework.web.client.ResponseErrorHandler;
import org.springframework.web.client.RestClientException;

import com.sitewhere.spi.SiteWhereSystemException;
import com.sitewhere.spi.error.ErrorCode;
import com.sitewhere.spi.error.ErrorLevel;

/**
 * Uses extra information passed by SiteWhere in headers to provide more information about errors.
 * 
 * @author Derek
 */
public class SiteWhereErrorHandler implements ResponseErrorHandler {

    /** Delegate to default error handler */
    private ResponseErrorHandler errorHandler = new DefaultResponseErrorHandler();

    /*
     * (non-Javadoc)
     * 
     * @see org.springframework.web.client.ResponseErrorHandler#handleError(org.springframework.http.client.
     * ClientHttpResponse)
     */
    public void handleError(ClientHttpResponse response) throws IOException {
        String errorCode = null;
        List<String> codeList = response.getHeaders().get(ISiteWhereWebConstants.HEADER_SITEWHERE_ERROR_CODE);
        if ((codeList != null) && (codeList.size() > 0)) {
            errorCode = codeList.get(0);
        }
        try {
            errorHandler.handleError(response);
        } catch (RestClientException e) {
            if (errorCode != null) {
                ErrorCode code = ErrorCode.valueOf(errorCode);
                throw new SiteWhereSystemException(code, ErrorLevel.ERROR, response.getRawStatusCode());
            } else {
                throw new SiteWhereSystemException(ErrorCode.Unknown, ErrorLevel.ERROR,
                        response.getRawStatusCode());
            }
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.springframework.web.client.ResponseErrorHandler#hasError(org.springframework.http.client.
     * ClientHttpResponse)
     */
    public boolean hasError(ClientHttpResponse response) throws IOException {
        return errorHandler.hasError(response);
    }
}